(MCT) -- Joan Rivers has been rushed to Manhattanâ€™s Mount Sinai Hospital, New York police said Thursday morning, reportedly after she suffered complications during an outpatient surgery at a nearby doctorâ€™s office.

Rivers, 81, had been undergoing throat surgery, possibly on her vocal cords, when a 911 call was placed describing a person who was either in cardiac or respiratory arrest, TMZ first reported. She was in critical condition, the website said.

Riversâ€™ representative has not yet responded to The Timesâ€™ request for comment.